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Infectivity, Growth, and Development of Echinostoma revolutum (Digenea: Echinostomatidae) in the Golden Hamster, Mesocricetus auratus
José Franco, Jane E. Huffman and Bernard Fried
The Journal of Parasitology
Vol. 72, No. 1 (Feb., 1986), pp. 142-147
Stable URL: http://www.jstor.org/stable/3281807
Page Count: 6
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All 30 female golden hamsters, Mesocricetus auratus, each fed 100 ± 25 metacercarial cysts of Echinostoma revolutum were found to be infected 2 to 105 days post-infection with 3 to 103 (avg. 38) flukes in the small intestine. Worm wet weights averaged 0.6 mg at 9 days, 3.5 mg at 14 days, and 19 mg at 42 days; average dry weights for the identical days were 0.2, 1.2 and 5.8 mg, respectively. The average body length of worms fixed in hot (80 C) alcohol-formalin-acetic acid was 0.33 mm on day 2, 5.11 mm on day 10, 9.30 mm on day 42 and 8.56 mm on day 105. Body and gonadal area increased rapidly from about day 5 to 15 and then less rapidly. Eggs of E. revolutum were seen in the feces of 10% of the hamsters by day 9, 89% by day 10 and 100% by day 11. Eggs teased from worms, embryonated in tap water, and produced miracidia which infected lab-reared Helisoma trivolvis.
The Journal of Parasitology © 1986 The American Society of Parasitologists